<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    *{
            margin: 0;
            padding: 0;
        }
        .box{
            position: relative;
        }
        .content{
            height: 200px;
            padding: 0 200px;
            background: white;
        }
        .left ,.right{
            position: absolute;
            top: 0;
            width: 200px;
            height: 200px;
            background: pink;
        }
        .left{
            left: 0;
        }
        .right{
            right: 0;
        }

  </style>
</head>
<body>
  <div class="box">
    <div class="content">content</div>
    <div class="left">left</div>
    <div class="right">right</div>
  </div>
</body>
</html>
